Earth Science 1. I can demonstrate and explain seasons using a model. 2. I can explain how the revolution of the Earth around the sun defines a year. 3. I can design a model that of the solar system that shows the relative order and scale of the planets, dwarf planets, comets, and asteroids to the sun. 4. I can describe the motion of planets and moons in terms of rotation on axis and orbits due to gravity. 5. I can explain the phases of the moon. 6. I can explain the apparent motion of the stars (constellations) and the sun across the sky. 7. I can explain lunar and solar eclipses. 8. I can explain the tides of the oceans as they relate to the gravitational pull and orbit of the moon.